There is no equivalent of ACCG in the real world. On Earth, all objects at the same altitude fall with the same acceleration due to gravity, and differences due to altitude are negligible within normal range. This was demonstrated by Galileo, apocryphally by dropping similarly-sized balls from the Leaning Tower of Pisa.

In this respect the CEE corresponds more closely to Aristotle's world model, in which he postulated that objects fall earthward in direct proportion to their weights.

The reason for the common assumption that heavier things always fall faster is that heavier objects typically have less air resistance than lighter objects - that's why a feather falls so much more slowly than a brick. But on the Moon, where there is little atmosphere, both fall in the same way.